May be the assignment section is not aware that assignment 03 is a special assignment and we have special instructions for loading it.
What is important is whether the copy of assignment loaded on
http://osprey.unisa.ac.za/bobj/upload has been received correctly.
I also got the same problem saying that "the copy received on sol ... ".
Liase with the lecturer and/or send by courier a copy of the source program on CD + a hard copy of the program + a copy of the mail from UNISA. This is the advice I can give.